SbBox3f Class Reference
[Basics]

3D box class. More...

#include <Inventor/SbBox.h>

Inheritance diagram for SbBox3f:

Public Member Functions
	SbBox3f ()
	SbBox3f (float xmin, float ymin, float zmin, float xmax, float ymax, float zmax)
	SbBox3f (const SbVec3f &_min, const SbVec3f &_max)
	~SbBox3f ()
const SbVec3f &	getMin () const
SbVec3f &	getMin ()
const SbVec3f &	getMax () const
SbVec3f &	getMax ()
SbVec3f	getCenter () const
void	extendBy (const SbVec3f &pt)
void	extendBy (const SbBox3f &bb)
SbBool	intersect (const SbVec3f &pt) const
SbBool	intersect (const SbBox3f &bb) const
SbBox3f	intersection (const SbBox3f &box) const
SbBool	contains (const SbBox3f &bb) const
SbBool	outside (const SbMatrix &MVP, int &cullBits) const
void	setBounds (float xmin, float ymin, float zmin, float xmax, float ymax, float zmax)
void	setBounds (const SbVec3f &_min, const SbVec3f &_max)
void	getBounds (float &xmin, float &ymin, float &zmin, float &xmax, float &ymax, float &zmax) const
void	getBounds (SbVec3f &_min, SbVec3f &_max) const
SbVec3f	getClosestPoint (const SbVec3f &point) const
void	getOrigin (float &originX, float &originY, float &originZ) const
void	getSize (float &sizeX, float &sizeY, float &sizeZ) const
SbVec3f	getSize () const
void	makeEmpty ()
SbBool	isEmpty () const
SbBool	hasVolume () const
void	getSpan (const SbVec3f &direction, float &dMin, float &dMax) const
void	transform (const SbMatrix &m)
float	getVolume () const
template<typename T >
	SbBox3f (const T &b)
float	computeMaxDistance2 (const SbVec3f &p) const
SbBool	triangleBoxOverlap (const SbVec3f &u0, const SbVec3f &u1, const SbVec3f &u2) const
Friends
int	operator== (const SbBox3f &b1, const SbBox3f &b2)
int	operator!= (const SbBox3f &b1, const SbBox3f &b2)
std::ostream &	operator<< (std::ostream &os, const SbBox3f &b)

Detailed Description

3D box class.

3D box which has planes parallel to the major axes and is specified by two points on a diagonal. This class is part of the standard Open Inventor datatype classes and is used as input and output to geometry operations (see SoGetBoundingBoxAction).

Constructor & Destructor Documentation

SbBox3f::SbBox3f ( ) [inline]

Constructor for a 3D float box.

The box is initially empty.

SbBox3f::SbBox3f	(	float	xmin,
		float	ymin,
		float	zmin,
		float	xmax,
		float	ymax,
		float	zmax
	)			`[inline]`

Constructor for a 3D float box.

xmin , ymin , zmin , xmax , ymax and zmax are the bounds of the box.

SbBox3f::SbBox3f	(	const SbVec3f &	_min,
		const SbVec3f &	_max
	)			`[inline]`

Constructor for a 3D float box.

m_min and m_max are the corners of the diagonal that define the box.

SbBox3f::~SbBox3f ( ) [inline]

Destructor.

template<typename T >

SbBox3f::SbBox3f ( const T & b ) [inline, explicit]

Constructor that converts an arbitrary SbBox3 to an SbBox3f.

Member Function Documentation

float SbBox3f::computeMaxDistance2 ( const SbVec3f & p ) const

Returns the squared maximum distance between a point and the 8 bounding box's vertices.

SbBool SbBox3f::contains ( const SbBox3f & bb ) const [inline]

Returns TRUE if the specified box is fully contained inside this box.

void SbBox3f::extendBy ( const SbBox3f & bb )

Extends this box (if necessary) to contain the specified box.

Reimplemented in SbXfBox3f.

void SbBox3f::extendBy ( const SbVec3f & pt ) [inline]

Extends this box (if necessary) to contain the specified point.

Reimplemented in SbXfBox3f.

void SbBox3f::getBounds	(	SbVec3f &	_min,
		SbVec3f &	_max
	)			const `[inline]`

Gets the corners of the box.

Reimplemented in SbXfBox3f.

void SbBox3f::getBounds	(	float &	xmin,
		float &	ymin,
		float &	zmin,
		float &	xmax,
		float &	ymax,
		float &	zmax
	)			const `[inline]`

Gets the corners of the box.

Reimplemented in SbXfBox3f.

SbVec3f SbBox3f::getCenter ( ) const

Returns the center of the box.

Reimplemented in SbXfBox3f.

SbVec3f SbBox3f::getClosestPoint ( const SbVec3f & point ) const

Returns the closest point on the box to the given point.

(Returns the point on the center of the Z face if passed the center.)

SbVec3f& SbBox3f::getMax ( ) [inline]

Returns the maximum point of the box.

The maximum point is the corner of the box with the highest X, Y, and Z values.

const SbVec3f& SbBox3f::getMax ( ) const [inline]

Returns the maximum point of the box.

The maximum point is the corner of the box with the highest X, Y, and Z values.

SbVec3f& SbBox3f::getMin ( ) [inline]

Returns the minimum point of the box.

The minimum point is the corner of the box with the lowest X, Y, and Z values.

const SbVec3f& SbBox3f::getMin ( ) const [inline]

Returns the minimum point of the box.

The minimum point is the corner of the box with the lowest X, Y, and Z values.

void SbBox3f::getOrigin	(	float &	originX,
		float &	originY,
		float &	originZ
	)			const `[inline]`

Gets box origin which is the same as the minimum corner of the box.

SbVec3f SbBox3f::getSize ( ) const [inline]

Gets box size.

void SbBox3f::getSize	(	float &	sizeX,
		float &	sizeY,
		float &	sizeZ
	)			const `[inline]`

Gets box size.

void SbBox3f::getSpan	(	const SbVec3f &	direction,
		float &	dMin,
		float &	dMax
	)			const

Finds the span of a box along a specified direction.

The span is the total distance the box occupies along a given direction. The total distance is returned in the form of a minimum and maximum distance from the origin of each of the corners of the box along the given direction. The difference between these two values is the span.

Reimplemented in SbXfBox3f.

float SbBox3f::getVolume ( ) const

Returns the volume of the box.

Reimplemented in SbXfBox3f.

SbBool SbBox3f::hasVolume ( ) const [inline]

Returns TRUE if all three dimensions of the box have positive size, and FALSE otherwise.

Reimplemented in SbXfBox3f.

SbBool SbBox3f::intersect ( const SbBox3f & bb ) const [inline]

Returns TRUE if the specified box intersects this box.

SbBool SbBox3f::intersect ( const SbVec3f & pt ) const

Returns TRUE if the specified point intersects this box.

Reimplemented in SbXfBox3f.

SbBox3f SbBox3f::intersection ( const SbBox3f & box ) const

Returns the intersection of the specified box with this box.

Returned box is empty if there is no intersection.

SbBool SbBox3f::isEmpty ( ) const [inline]

Returns TRUE if the box is empty, and FALSE otherwise. Note: Setting the box to all zeros does not make it "empty". Use the makeEmpty() method. (This method only returns true if the maximum X value is less than the minimum X value.)

Reimplemented in SbXfBox3f.

void SbBox3f::makeEmpty ( ) [inline]

Makes an empty box.

Reimplemented in SbXfBox3f.

SbBool SbBox3f::outside	(	const SbMatrix &	MVP,
		int &	cullBits
	)			const

Returns TRUE if bounding box is completely outside the view-volume defined by the model+view+projection matrix given.

"cullBits" keeps track of which view-volume clipping planes the box is completely inside of; if a 'parent' bounding box of this bounding box was found to be completely inside the left/right clipping planes, the low bit of cullBits will be set to zero, and this routine will not test this box against those planes. When cullBits is zero, it is a waste of time to call this function! Before calling this the first time, set cullBits to 7 (SoGLRenderAction and SoSeparator will handle this automatically for render culling).

void SbBox3f::setBounds	(	const SbVec3f &	_min,
		const SbVec3f &	_max
	)			`[inline]`

Sets the corners of the box.

Reimplemented in SbXfBox3f.

void SbBox3f::setBounds	(	float	xmin,
		float	ymin,
		float	zmin,
		float	xmax,
		float	ymax,
		float	zmax
	)			`[inline]`

Sets the corners of the box.

Reimplemented in SbXfBox3f.

void SbBox3f::transform ( const SbMatrix & m )

Transforms box by matrix, enlarging box to contain result.

Reimplemented in SbXfBox3f.

SbBool SbBox3f::triangleBoxOverlap	(	const SbVec3f &	u0,
		const SbVec3f &	u1,
		const SbVec3f &	u2
	)			const

Return true if the given triangle intersects the bounding box.

Note that intersection considers the whole box, not just the border. Therefore a triangle completely inside the box will return true.

Friends And Related Function Documentation

int operator!=	(	const SbBox3f &	b1,
		const SbBox3f &	b2
	)			`[friend]`

Inequality comparison.

Reimplemented in SbXfBox3f.

std::ostream& operator<<	(	std::ostream &	os,
		const SbBox3f &	b
	)			`[friend]`

Writes the box to the specified output stream.

int operator==	(	const SbBox3f &	b1,
		const SbBox3f &	b2
	)			`[friend]`

Equality comparison.

Reimplemented in SbXfBox3f.

The documentation for this class was generated from the following file:

Inventor/SbBox.h

SbBox3f Class Reference [Basics]

Public Member Functions

Friends

Detailed Description

SEE ALSO

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

SbBox3f Class Reference
[Basics]